#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main(int argc, char** args) {
    long long k, n, p;
    scanf("%lld %lld %lld", &k, &n, &p);
    long long *f, *a;
    f = calloc(k, sizeof(long long));
    a = calloc(k, sizeof(long long));
    for (int i = 0; i < k; i++) {
        scanf("%lld", &f[i]);
    }
    for (int i = 0; i < k; i++) {
        scanf("%lld", &a[i]);
    }

    if (n < k) {
        printf("%lld", f[n-1]%p);
        return 0;
    }



    printf("\n");
    return 0;
}